'nocal' Do not apply the gains file. 'nopass' Do not apply bandpass corrections. 'nopol' Do not apply the polarization leakage file. 'nowide' Do not copy across wide-band channels. 'nochannel' Do not copy across spectral channels. 'unflagged' Copy only those records where there are some unflagged visibilites. 'contsub' Continuum subtraction using a linear fit to the real and imaginary parts of each spectral window. Exclude badchan and endchan specified below. 'conjugate' Conjugate visibilitiesfxcal' Calibrate FX correlator data
by dividing the cross correlations by the geometric mean of the autocorrelations. 'hanning' Hanning smooth each spectral window. 'holo' Replace u,v with dra,ddec for holography. 'linecal' Remove phase slope across passband due to line length changes. This option also corrects the phase difference between the wide channels due to line length. options=linecal,wide will re-make the wideband from the channel data after the phase slope is removed. option can gain in SNR for the wide channels might beparang' Multiply LR by expi(2*chi) and RL by expi(-2*chi)
where chi is the parallactic angle for Alt-Az antennas. 'passband' Fit passband to lsb and correct the uv-data. Can be used when the source is strong. e.g. for planets. The passband is estimated from the lsb, smoothed within each spectral window, and applied to the lsb data. The complex conjugate is applied to the usb. This corrects for time variable IF passband errors. The uv-data must contain the same spectral windows in both sidebands of LO1. 'uvrotate' Rotate uv-coordinates from current to standard epoch. The standard epoch, ra, dec can be changed using PUTHD. 'avechan' Average unflagged spectral channels into wide,2,1 for lsb and usb of LO1 respectively. The data are weighted by bandwidth and exclude badchan and endchan specified below. Also remake wideband average for each spectral window. 'avewide' Average unflagged wideband channels into wide,2,1 for lsb and usb of LO1 respectively. The data are weighted by bandwidth and exclude badchan specified below and wide,2,1
NOTE: Options=nochannel cannot be used with "hanning", "passband" and "contsub". For these 3 options no processing is performed on the wideband data.
model = flux * (uvdist/scale) ** indexThe model visibility is subtracted from the uv-data. Default model=0,0,0. i.e. no model is subtracted.